| 摘要 |
<P>PROBLEM TO BE SOLVED: To make cooling efficiency uniform on a flow channel surface on upstream sides of a turbine blade train in a gas turbine for supplying cool air to the flow channel surface. <P>SOLUTION: The flow channel surface 31, which is formed continuously with reference surfaces 32 on which a plurality of turbine blades 7b are installed and is positioned on the upstream sides of the turbine blade train, includes: depressed areas 31a which are at least part of areas overlapping with leading edges 7b1 of the turbine blades 7b when viewed from the direction of a turbine axis line L and are depressed from the reference surfaces 32; and protruding areas 31b which are at least part of areas positioned between the leading edges 7b1 of the turbine blades 7b when viewed from the direction of the turbine axis line L and protrude from the reference surfaces 32. <P>COPYRIGHT: (C)2013,JPO&INPIT |
